Which image best represents a portion of the heliocentric model of the solar system? (S=Sun, E=Earth, and M=Moon)
a)
b)
d)
wo
wo
S
S
M
M
om 3
а
С
d

Which label correctly identifies what x represents in the concept map?

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind

One drawback of dams is that they can flood land upstream from the dam and reduce water flow downstream from the dam. a. true b. false